Mushkin Enhanced Blackline Frostbyte 4 GB Desktop Memory 996580,Mushkin Direct,996580" /> 4 GB Dual Kit (2 X 2 GB) DDR-800 (PC2-6400) DDR2 240-PIN DIMM This XP-Series PC2-6400 (DDR2-800) 4GB kit utilizes 4-4-4-12 timings at 2.0 to 2.1v Using Mushkin's Frostbyte heatspreader technology, this kit is an excellent choice for those seeking speed and stability.